Crazy K&A Mini Micro LED Keychain Key Ring Super Flash Bright Flashlight Torch White Light - Great for Home, Travel and Outdoor Use (002Red) GENUINE GOODFIRE PRODUCTS ,Don't buy fakes from unauthorized sellers. Dimension: 15mm x 60mm; Powered by : LR41 x 4 ( included); Color:Black/Silver/Purple/Red/Blue; Waterproof and shock proof design, easy to deal with the wild bad environment;